JRun 4 replaces the use-webserver-root property used in JRun 3.1 with a more generalized way to map virtual paths. Use a virtual path only if you use the web server root exclusively. If you do not use a virtual path, JRun searches the web application context root and then the web server root. Virtual path mappings in a jrun-web.xml file in a web application's WEB-INF directory let you map a resource path to a physical system path that might be outside of the web application context root. For example, the following entry sets a virtual path to the c:/InetPub/wwwroot directory: <virtual-mapping> <resource-path>/*</resource-path> <system-path>c:/InetPub/wwwroot</system-path> </virtual-mapping>